Cyber Resilience

CVE-2026-44795

RCE in Linuxfoundation Spinnaker ≤ 2025.3.3

RCEDeserialization
Published
10 July 2026
Modified
21 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0054 43th percentile
Risk Priority 66 floored blend · peak EPSS

Summary

CVE-2026-44795 is a high-severity Unsafe Reflection (CWE-470) vulnerability in Linuxfoundation Spinnaker. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Reflective Code Loading (T1620); ranked at the 43th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A05:2025 InjectionA08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability Data

Spinnaker is an open source, multi-cloud continuous delivery platform. Prior to 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3, unsafe YAML processing bypasses safe deserialization when using CloudFormation deployments or CloudFoundry baking. The use of a non-safe constructor allows arbitrary loading of Java…

more

classes, leading to remote code execution. This issue is fixed in versions 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3.

CWE(s)
CWE-470CWE-502

Related Threats

MITRE ATT&CK Enterprise Techniques

T1620 Reflective Code Loading Stealth
Adversaries may reflectively load code into a process in order to conceal the execution of malicious payloads.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-55175Same product: Linuxfoundation Spinnaker
CVE-2026-32604Same product: Linuxfoundation Spinnaker
CVE-2025-61916Same product: Linuxfoundation Spinnaker
CVE-2026-32613Same product: Linuxfoundation Spinnaker
CVE-2023-39348Same product: Linuxfoundation Spinnaker
CVE-2026-33701Same vendor: Linuxfoundation
CVE-2024-48063Same vendor: Linuxfoundation
CVE-2025-32434Same vendor: Linuxfoundation
CVE-2026-27889Same vendor: Linuxfoundation
CVE-2025-69261Same vendor: Linuxfoundation

Affected Assets

linuxfoundation
spinnaker
≤ 2025.3.3 · 2025.4.0 — 2025.4.4 · 2026.0.0 — 2026.0.3

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can uncover deserialization flaws before deployment.

SI-10 Information Input Validation good match

Input validation directly stops externally supplied class or method names from selecting improper code via reflection.

AC-3 Access Enforcement partial match

Enforces authorization checks on the code or classes ultimately invoked, blocking unauthorized selections even if reflection is used.

AC-6 Least Privilege partial match

Limits privileges of any code reached through unsafe reflection, reducing blast radius without stopping the selection itself.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles such as safe deserialization and input sanitization structurally prevent the weakness from being introduced.

SI-7 Software, Firmware, and Information Integrity partial match

Integrity verification tools can detect malformed or tampered serialized data after the fact.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly avoid introducing externally controlled class selection via reflection.

ID.RA-01 partial match
prevents

Vulnerability identification processes can discover unsafe reflection during code review or scanning.

PR.PS-05 partial match
prevents

Preventing execution of unauthorized code can block exploitation of unsafe reflection at runtime.

PR.PS-02 none match
prevents

PR.PS-02 addresses only post-deployment updates/patching and cannot prevent introduction of unsafe deserialization code, yet it can remediate some instances when the flaw exists in outdated libraries or components.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding standards directly forbid unsafe reflection and require whitelisting or static alternatives.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect and block unsafe reflection patterns before release.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates input validation and design reviews that reduce unsafe reflection risks.

A.8.26 Application security requirements partial match
prevents

Application security requirements can explicitly prohibit or constrain reflection based on untrusted input.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles discourage dynamic class loading from external data sources.

A.8.8 Management of technical vulnerabilities partial match
finds

Regular scanning of third-party libraries and timely patching reduce the likelihood that unsafe deserialization vulnerabilities remain active.

References